"Combined with an Intel NUC mainboard the D1NU series allows to set up extremely efficient, fanless yet powerful computers with a volume of only 1.3 liters. Technically the D1NU is not a case but a heat sink for the built in NUC platform. Two massive aluminium heat sinks are fixed between the front and rear bezel. Lost heat is conducted via a precision milled heat spreader to these heat sinks. As no ventilation holes are required for cooling, the D1NU is suitable for all applications in which noiseless operation, dust protection and low power consumption is required on minimum space.

FULL STORY @ FANLESSTECH(http://www.fanlesstech.com/2013/02/impactics-nuc-case.html)